Ballpoint pen



FIG. 1 is a perspective view of a ballpoint pen showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is an enlarged left side view thereof;

FIG. 5 is an enlarged right side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a further bottom view of the ballpoint pen, with the shaft extended and the pivotal lever in a closed position;

FIG. 8 is a further bottom view of the ballpoint pen, with the shaft unextended and the pivotal lever in an open position;

FIG. 9 is a further bottom view of the ballpoint pen, with the shaft extended and the pivotal lever in an open position; and,

FIG. 10 is a further perspective view of the ballpoint pen, with the pivotal lever in the open position, while in use.

The unshown top views are mirror images of FIGS. 3, 7, 8 and 9.

The broken lines showing a person's hand in FIG. 10 illustrate environmental matter and form no part of the claimed design. 

The ornamental design for a ballpoint pen, as shown and described. 